Brake



Nov. 22, 1932.

J. J. WHARAM BRAK E Filed Oct. 27. 1931 2 Sheets-Sheet 1 ATTORNEY.

Nov. 22, 1932. J WHARAM 1,888,708

' BRAKE Filed Oct., 27, 1931 2 Sheets-Sheet 2 INVENTOR.

A TTORNE Y.

Patented Nov. 22 1932 r JOHN J. WHARAM, OF DETROIT, MICI-ITGAN, .AS SIGNOR TO FORD MOTOR COMPANY, OF

DEARBORN, MICHIGAN, A CORPORATION or DELAWARE A "BR E Application filed 0ctober27, 193 "Serial n 571,307.

The object of my/invention isto providea brake having-a novel lever for'manually actuating the same, which lever will be ofsimple construction, durable, and inexpensive 'to manufacture; f I I 7 Still a further objectofvmy inventionis to provide a lever 'especiallysuitable for use as an emergency brake lever on a motor vehi cle. My improved lever is adapted to be piv oted to the side of the vehicle transmission and is so constructed that a rigidshaft is'pro vided from end to end in the direction moved for actuating the brakes; while a resilient shaft is provided in a transverse direction to prevent engine oscillation due to torsional reaction and torqu' 'recoil of the engine, from vibrating the lever. I I I I In all automobile engines with which the applicant is familiar a certain amount of torsional reaction isunavoidable which reac tion tends to oscillate the engine around its crankshaft. This reaction causes a verynoticeable vibration in engines of from four to six cylinders and even in vehicle engines of eight or more cylinders; where exceptional smoothness is desired, this vibration must be prevented from affecting the body of the car. In order to prevent this transfer of the engine vibration it has become'customary to mount theengine resiliently in the frame,- that is, by means of spring supports or rubber cushions, tothereby allowthe engine a certain freedom of movement independently of the body. Th-us, theinertia of the engineab i sorbs the force of these vibrations before they are transmitted tothe vehicle frame. This construction would be an ideal arrangement if it were not for the presence of certain of the control members of the engine'in the drivers compartment. These members, namely the gear shift lever and brake lever, have in most cases been attached to the engine and transmission unit so that the oscillation of the engine causes these levers to vibrate with a relatively large amplitude, I

The chief purpose of this invention is, therefore, to provide a contro l lever which is mounted on the engine unit in the conven-I tional manner but which lever is rigid in all planes other than the planeof vibration, and

lexible the transverse plane so V thatthe lever'will remainstationary by its own nertia even when the engine is oscillat ng: w

, Myconstruction is especially suitable'for the emergency brake hand lever construction,

this" lever being pivotally' mounted on' the transmission and engine unit whereby draw-i ing the levenrearwardly applies the emergency brake. The alleged novel feature of this construction is, the means whereby the upper half of they lever is'flexibly connected to the lower portion insuchmanner that oscillation of the transmission and lower portion of the lever does-not vibrate the upper part thereof. Thisflexibleconnection is so formed'that its plane of movementislimited toj the plane of engine oscillation so that no flexibility between theparts of the'lever is a-llowedinthe plane through which the lever is moved'to-ap'ply thebrake. Thus, a substantial rigid connection resists the normal brake applying .stress impressed uponthe lf YerQY j Stilha furtherobject of my invention is to provide a brake lever having a longitudinal;

ly extendingbroached opening extending part way there'through Which is adapted. to

receive) a hand operating shaft, this lever I being of such shape thata broach may be drawn 'therethrough Without interfering with the unbroachedportion of the lever.

" With these and other objects in View, my I invention consists inthe arrangement, con-' struction andcombination of the-various parts of my improved, device, as d escribedin my specification, claimed inmy claims, and illustrated inwhichf,

Figure 1- shows aside elevation of an automobile transmission havingmy improved device mounted thereon, the intermediate portion of which is shown in'cross section to better illustrate the construction. I I I Figure 2 showsa rear vview of the transm'issionsh'own in Figure '1, my brake. operat in}; lever being also shown in section this VleW.

I Figure showsan enlarged sectional View, taken on'the line 3+3 .of-Figure .2, and

in the accompanying drawings,

. pin .17 securing the pin and arm together.

Thelower end of this arm 16 is provided with r a fork ,18 i

Figure a shows a sectional view, taken on the line H of Figure 2. V

Referring to the accompanying drawings, I have used the reference numeral 10 to indicate generally a transmission and clutch housingv of the type usually associated with automobile engines. "A' transmission cover 11 is secured over the upper portionof the housing 10, and a gear shift lever 12 is universally mounted in a tubular support 13 formed integrallywith thecover and which extends upwardly therefrom. Cast integrally with one side of the support 131 have provided a. rectangular-shaped bracket 14:

through which my improved emergency brake operating lever extends andis pivotal:

A transversefpin 15 is rotatly' mountedl ably secured in the bracket 14 to form a,ful-

crum foriny lever. My lever consists of two parts, thelower portion 'beingan arm 16 which projects through the bracket through which thepin 15 extends; a dowel n which a pawl 19 is pivotally mounted, one end of this pawl co-acting with a ratchet member 20 which issecured to the side of the transmission housing 10. The I other end of the pawl 19is oivotally connect- I ed to a rod 21 whichextends upwardly P -flS S wn injFi u 3, whereby the broach ma 1;

throughla suitable opening in the center oi the pin 15.. That portion of the arm 16 just above the fork 18 is apertu'red to receive a pin 30 and aclevis 31 which is fastened to the end of an emergency'brake operating rod 32,

whereby a forward movement of the arm 16 will apply the emergency brakes on the ve- It will be noted fro1nFigure'45 that the upper portion of the arm 16 is provided with a: rectangular shaped opening 22 extending lengthwise .ftherethrough. In order that, such, an opening may drawn lengthwise through i the opening 22 without'interference from the lower portion of the arm.

Thehand operating portion'of my emergencybrake lever is comprised of a tubular member 23 having: a handle formed. on its upper end and having its lower end- 25 ma chined to a rectangular shape-which is adapted to lit in the rectangular opening 22. The transverse thickness of this rectangular portiongis considerably less thanthe width of the rectangular opening .22but the longitudinal dimensions of both the opening and the rectangular portionkare substantially the same.

Thusawhen the member 221s inserted in the:

arm 16 alim ited lateral movement between the two members isallowed whileno longitudinalv relative movement: is permitted.

IThe handle v nember.23 after-being put in 14 and be conveniently ma'-' broach therethrough,

. the opening 22 is pivotally secured therein means of a pin 24. Suitable clearance between the pin 24 and the portion 25 is pro- I vided so that the tube 23 may oscillate in a transverse direction in the opening 22. I

In order that this assembly may notrattle and'that a more pleasing appearance maybe given to the device; a bell-shaped shroud 26 is assembled on the tube 23 so as to enclose .the upper end of the'arm-- 16. An annular ring of resilient rulober 27 extends around the. upperend of the arm 16 so as to closely -fitinto theshroud 26 and isheld in position,

by means of a washer 28 and snap ring 29. Consequently, when the lever '23tends to pivor around the pin 15 i'n a lateral direction the portions of thering'27 on each side of the armfare alternately compressed so that only afsmall amplitude ofvibrationis permitted.

I Among the many advantages arising from If the use of m improvedv deviceitmay be well to mention ,th at when the brake is actu ateda rigidlconn'ection between the portion 23 and the arm 16 is provided so that the stress of applyingthebrakes is notntaken through any'resilient connection'to thereby make the devicev as safe and reliable as a g solidlever. However,when theengine tends to oscillate around the lcrankshaft then the upper portion of the lever is permitted a resilient movement relative thereto so that the lever will remain substantially stationary due to its owninertia. I I

Some changes may be made in the construction, combination and arrangement'of f the various parts of my improved. device without departing .fromthe spirit of my 'in vention; and it is my intentionItocover by myclaims such changes as inay 'reasonably' be included within the scope thereof. I

j I claim as my,invention:

lit?

"1.; A hand lever construction comprising a pair of longitudinally spaced members one of which is provided with, a longitudinal .bpening a apted to receive th 'a ie end of the other member'toform'atelescopic' con nect1on,, the elements formlng [said connec tion being non-symmetrical whereby clear-' ance between" said opening and the sides of 1 saidjco-acting member is provided; whereby relative 'movemei'it between the members in a'planetransverse to the normalload-apply '1 ing plane is allowed and rigidfconnection between said elements in the normal load applying plane is provided.

2. A handlever construction comprising an'arm adapted to be plvotallysecured to a vehlcle transmission housing so as to oscilr late in a longitudinal plane, said arm having thatportion'a'dj acent to its fulcrum formed with a, longitudinally extending rectangular shaped opening, therein, and a'lever having its adjacent end'fformed 'in a rectangular shape which jis telescopically fitted into said I said rectangularv end being sopro E1.

portioned that swinging movement of the lever in a plane transverse to the normal plane of operation is permitted and movement between the arm and lever in the loadapplying plane is prevented.

3. A device, as claimed in claim 2, having resilient means disposed between said arm and lever adapted to resiliently restrict said swinging movement.

4. A hand lever construction comprising an arm pivotally mounted to oscillate in the normal load-applying plane, said arm having that portion adjacent to its fulcrum apertured longitudinally to a rectangular shape, a lever having the one end formed to a rectangular shape telescopically fitted into said opening, the dimensions of said opening and lever measured through the normal plane of operation being substantially the same and the dimensions of said opening and levermeasured transversely to said plane being materially different, whereby relative movement between the arm and lever in a planetransverse to the normal load-applying plane will I be permitted, and resilient means disposed between said members adapted to resiliently restrict said relative movement.

5. In a hand lever construction, an arm having a pin extending transversely therethrough by means of which it is pivotally in said opening, a resilient rubber ring disposed around sald telescopicconnectlon, and

a shroud secured to said lever and extending 1 down over said ring to thereby resiliently restrict the movementof the lever relative to said arm. i

7 Ahand lever construction comprising a pair of longitudinally spaced members one of which is provided with a longitudinal opening adapted to receive the adjacent end of the other member to form a telescopic connection, the elements forming said connection being non-symmetrical whereby clearance between said opening and the sides of said coacting member is provided whereby relative movementbetween, the members in a plane transverse to the normal load applying plane is allowed and a rigid connection between said elements in the normal load applying plane is provided,a resilient ring of rubber disposed around the outsideof the oute'r of said telescopic members, and a shroudsecured to the other of said members, said shroud'extending down, over said resilient ring, whereby transverse relative movement of said telescopic members is resiliently re stricted. A

October 26, 1931. JOHN J. WHARAM.

v mounted, said arm having a rectangular shaped opening extending longitudinally through its end adjacent to said pivot, a lever having one end thereof formed to a rectangular shape telescopically fitted into said opening, said end and opening being so proportioned that a rigid connection is provided between said members in a normal load-applying plane and a swinging connection between said members in a plane trans verse to said load-applying plane is provided, a ring of resilient rubber disposed around the outside of said apertured end, and a shroud secured to said lever and extending down over said end and ring adapted to closely fit said rubber, whereby transverse movement of said lever is resiliently restricted. V

6. A transmission housing having an apertured bracket projecting from one side thereof in which a pin is transversely mounted, an arm extending upwardly through said bracket and secured to said pin so that it may oscillate aroundsaid bracket in a fore and aft direction, said arm having a rectangular shaped opening extending from its upper end down through the axis of oscillation, a hand lever having its lower end formed to a rectangular shape telescopically fitted into said opening, the dimensions of said end and opening being substantially the same in the plane of oscillation, and materially different in a plane at right angles thereto, a pin extending through said telescopic connection permitting the lever to swing transversely 

